1. Using a whisk, mix egg whites, caster sugar, and salt until combined. Add flour and mix until combined. Stir in melted butter. Lightly stir in flaked almonds. Leave in fridge for 30 minutes.
2. Spread a tsp of batter thinly on a tray lined with baking paper using the back of the fork dipped in water. Ensure all almond flakes are separated and are not on top of each other.
3. Bake in 150°C preheated oven for 20 minutes, or until lightly browned.
4. Working quickly, lift the tuiles off the tray using a knife. Allow to cool and hardened.